Kennedy, Hugh (2023). The Prophet and the Age of the Caliphates: The Islamic Near East from the 6th to the 11th Century (Fourth ed.). Abingdon, Oxon and New York: Routledge. ISBN 978-0-367-36690-2.
Kennedy, Hugh (2023). The Prophet and the Age of the Caliphates: The Islamic Near East from the 6th to the 11th Century (Fourth ed.). Abingdon, Oxon and New York: Routledge. ISBN 978-0-367-36690-2.